The body of Whitney Houston was found in a hotel bathtub, coroners have said, but say it will take weeks to determine precisely how she died.
Police requested that no details about the singer's autopsy be publicly released, Assistant Chief Coroner Ed Winter told reporters on Sunday afternoon.
He said toxicology results would take weeks and the results were needed to determine how Houston died.
Dr Winter declined to release any details about what investigators found in the room, but said coroner's officials were not ruling out any potential causes of death.
He said there were no signs of trauma on Houston's body.
Detective investigating the death of Whitney Houston on the eve of the Grammy Awards are pursuing a theory that she accidentally drowned in the bath in her luxury hotel suite after taking prescription drugs and drinking heavily over the previous two evenings.
The troubled 48-year-old singer, who had battled years of addiction, was found dead in her room at the Beverly Hilton Hotel in Los Angeles hours before she was due to attend a star-studded party downstairs.
Two bodyguards, a hairdresser and stylist were believed to have been in the singer's room at the time and discovered her body, with her head under the water, after becoming concerned that she had been in the bathroom for more than an hour.
Prescription drugs, but no illegal drugs, were found in the suite. Houston was known to take Xanax, a drug to ease anxiety which can cause drowsiness, before performances. Anti-anxiety drugs Valium and lorazepam were also believed to have been found.
Her 18-year-old daughter Bobbi Kristina was rushed to the hospital today to be "treated for stress and anxiety." She has been released. TMZ reported that Brown is on his way to Los Angeles to be with her. Saturday night, he remained on tour with New Edition and performed in Nashville, Tenn.
Earlier today, the Houston family released their first statement about the pop icon's untimely death.
"We are devastated by the loss of our beloved Whitney," they said in a statement through Houston's publicist. "This is an unimaginable tragedy and we will miss her terribly. We appreciate the outpouring of love and support from her fans and friends."
Brown also put out a statement today saying "I am deeply saddened at the passing of my ex-wife, Whitney Houston. At this time, we ask for privacy, especially for my daughter, Bobbi- Kristina. I appreciate all of the condolences that have been directed towards my family and I at this most difficult time."